prepare-release.yml

name: Prepare Release

on:
  workflow_dispatch:
    inputs:
      bump:
        description: "Version bump type"
        required: true
        type: choice
        options:
          - patch
          - minor
          - major
        default: patch

permissions:
  contents: write
  pull-requests: write

jobs:
  prepare:
    runs-on: ubuntu-latest
    steps:
      - name: Determine base branch
        id: base
        run: |
          if [ "${{ inputs.bump }}" = "patch" ]; then
            echo "branch=released" >> "$GITHUB_OUTPUT"
          else
            echo "branch=develop" >> "$GITHUB_OUTPUT"
          fi

      - uses: actions/checkout@v7
        with:
          ref: ${{ steps.base.outputs.branch }}
          fetch-depth: 0

      - uses: actions/setup-node@v6
        with:
          node-version-file: ".node-version"

      - name: Bump version
        id: version
        run: |
          NEW_VERSION=$(npm version "${{ inputs.bump }}" --no-git-tag-version | sed 's/^v//')
          echo "version=$NEW_VERSION" >> "$GITHUB_OUTPUT"

      - name: Determine release branch name
        id: branch
        run: |
          if [ "${{ inputs.bump }}" = "patch" ]; then
            echo "name=hotfix/${{ steps.version.outputs.version }}" >> "$GITHUB_OUTPUT"
          else
            echo "name=release/${{ steps.version.outputs.version }}" >> "$GITHUB_OUTPUT"
          fi

      - name: Commit version bump
        run: |
          git config user.name "github-actions[bot]"
          git config user.email "41898282+github-actions[bot]@users.noreply.github.com"
          git checkout -b "${{ steps.branch.outputs.name }}"
          git add package.json
          git commit -m "chore: bump version ${{ steps.version.outputs.version }}"
          git push origin "${{ steps.branch.outputs.name }}"

      - name: Open release PR
        env:
          GH_TOKEN: ${{ github.token }}
        run: |
          gh pr create \
            --repo "${{ github.repository }}" \
            --base "${{ steps.base.outputs.branch }}" \
            --head "${{ steps.branch.outputs.name }}" \
            --title "[Release] New release ${{ steps.version.outputs.version }} (${{ inputs.bump }})" \
            --body "Automated version bump to \`${{ steps.version.outputs.version }}\` (${{ inputs.bump }}). Merging this into \`${{ steps.base.outputs.branch }}\`$( [ "${{ steps.base.outputs.branch }}" = "released" ] && echo " will automatically tag and publish the release." || echo "; promoting develop to released still needs to be done separately.")"